package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {
    @Resource
    private DishFlavorService dishFlavorService;

    //新增菜品，同时保存对应的口味数据
    @Transactional
    @Override
    public void savaWithFlavor(DishDto dishDto) {
        //保存菜品的信息到菜品表dish
        this.save(dishDto);

        //获取菜品的id
        Long dishId = dishDto.getId();

        //获取菜品的口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        //设置保存菜品的id
        flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }

    //根据id查询菜品信息和口味信息
    @Override
    public DishDto getByIdWhitFlavor(Long id) {
        //查询菜品基本信息，从Dish表查询
        Dish dish = this.getById(id);

        //创建DishDto对象
        DishDto dishDto = new DishDto();

        //将dish对象拷贝到DishDto对象中
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前菜品对应的口味信息，从dish_flavors表中查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    /*修改菜品*/
    @Override
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应的口味数据，dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        //执行删除操作
        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据，dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }


}
